<template>
    <div>
      <el-form :rules="rules"
               element-loading-text="正在登录..."
               element-loading-spinner="el-icon-loading"
               element-loading-background="rgba(0, 0, 0, 0.8)"
               ref="loginForm"
               :model="loginForm"
               class="loginContainer">
        <h3 class="loginTitle">系统登录</h3>
        <el-form-item prop="username">
          <el-input type="text" v-model="loginForm.username" auto-complete="false"
                    placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input type="password" v-model="loginForm.password" auto-complete="false"
                    placeholder="请输入密码"></el-input>
        </el-form-item>
        <el-form-item prop="code">
          <el-input size="normal" type="text" v-model="loginForm.code"
                    auto-complete="false" placeholder="点击图片更换验证码" style="width: 250px;margin-right: 5px"></el-input>
          <img :src="captchaUrl" @click="updateCaptcha">
        </el-form-item>
        <el-checkbox class="loginRemember" v-model="checked">记住我</el-checkbox>
          <el-button type="primary" style="width: 100%" @click="submitLogin">
            登录</el-button>
      </el-form>
    </div>
</template>

<script>
    export default {
      name: "Login",
      data() {
        return {
          captchaUrl: '/captcha?time=' + new Date(),
          loginForm: {
            username: 'admin',
            password: '123',
            code:''
          },
          loading:false,
          checked: true,
          rules: {
            username: [{required: true, message: '请输入用户名', trigger: 'blur'}],
            password: [{required: true, message: '请输入密码', trigger: 'blur'}],
            code: [{required: true, message: '请输入验证码', trigger: 'blur'}]
          }
        }
      },
      methods:{
        updateCaptcha(){
            this.captchaUrl = '/captcha?time=' + new Date();
        },
        submitLogin(){
          this.$refs.loginForm.validate((valid)=>{
            if (valid){
                this.loading = true;
                this.postRequest('/login',this.loginForm).then(resp=>{
                  this.loading = false;
                  if (resp){
                    //存储用户token
                    const tokenStr = resp.obj.tokenHead+resp.obj.token;
                    window.sessionStorage.setItem('tokenStr',tokenStr);
                    //跳转首页
                    let path = this.$route.query.redirect;
                    this.$router.replace((path == '/' || path == undefined) ? '/home' : path);
                  }
                })
            } else {
                this.$message.error('请输入所有字段');
                return false;
            }
          })
        }
      }
    }
</script>

<style>
    .loginContainer {
      border-radius: 15px;
      background-clip: padding-box;
      margin: 180px auto;
      width: 350px;
      padding: 15px 35px 15px 35px;
      background: #fff;
      border: 1px solid #eaeaea;
      box-shadow: 0 0 25px #cac6c6;
    }
    .loginTitle {
      margin: 0px auto 40px auto;
      text-align: center;
      color: #505458;
    }
    .loginRemember {
      text-align: left;
      margin: 0px 0px 15px 0px;
    }
    .el-form-item__content{
      display: flex;
      align-items: center;
    }
</style>
